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I would like to know the elements of the periodic table in Spanish, because my parents do not know much about them. I want to be able to describe them a bit about the elements, but I have no background information about the elements.

I found this website called vanderkrogt.net, but it does not look reliable.

That site is reliable, except that it is a little too liberal in using accented characters: «helio» is «helio» rather than «hélio». Despite all sources using capitalized names in isolation, when used in texts, elements in Spanish are not capitalized.
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Carlos Eugenio Thompson PinzónDec 9 '13 at 11:06